:nilclass:

:singleton_method: 
:instance_method: 
  :&: [FalseClass]
  :^: [TrueClass, FalseClass]
  :nil?: [TrueClass, FalseClass]
  :rationalize: [Rational]
  :to_a: [Array]
  :to_c: [Complex]
  :to_f: [Float]
  :to_i: [Fixnum]
  :to_r: [Rational]
  :to_s: [String]
  :|: [TrueClass, FalseClass]